ariboflavinosis (MONDO_0004573) is a dietary deficiency of riboflavin causing a syndrome chiefly marked by cheilitis, angular stomatitis, glossitis associated with a purplish red or magenta-colored tongue that may show fissures, corneal vascularization, dyssebacia, and anemia. (Dorland, 27th ed). Also known as: riboflavin deficiency, vitamin B2 deficiency.